A life focused on *being* something is risky, because there's a cultural meme that completes the becoming as "...and then I'll live happily ever after". And unless the focus is on being someone who lives happily, one might find that one has spent so much time Becoming Something that one has forgotten to learn how to live happily.

Folks often forget that "happily ever after" is the end of a fairy tale. They are even more prone to leave out of their considerations that "Once upon a time" is how they begin... The Russians have an more realistic view of things -- their fairy tales often begin with "жили-были" [there lived-there was] and end with the narrator claiming that the mead served at the time dripped down his mustache but didn't make it into his mouth...